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Add a new --exact parameter to register_peers

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This commit is contained in:
Jeff Bradberry
2022-01-10 15:12:04 -05:00
parent 63867518ee
commit 5ffe91f069
1 changed files with 28 additions and 3 deletions
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31
awx/main/management/commands/register_peers.py
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@@ -1,4 +1,5 @@
from django.core.management.base import BaseCommand, CommandError
from django.db import transaction
from awx.main.models import Instance, InstanceLink
@@ -15,13 +16,24 @@ class Command(BaseCommand):
parser.add_argument('source', type=str, help="Receptor node opening the connections.")
parser.add_argument('--peers', type=str, nargs='+', required=False, help="Nodes that the source node connects out to.")
parser.add_argument('--disconnect', type=str, nargs='+', required=False, help="Nodes that should no longer be connected to by the source node.")
parser.add_argument(
'--exact',
type=str,
nargs='+',
required=False,
help="The exact set of nodes the source node should connect out to. Any existing links registered in the database that do not match will be removed.",
)
def handle(self, **options):
nodes = Instance.objects.in_bulk(field_name='hostname')
if options['source'] not in nodes:
raise CommandError(f"Host {options['source']} is not a registered instance.")
if not options['peers'] and not options['disconnect']:
raise CommandError("One of the options --peers or --disconnect is required.")
if not (options['peers'] or options['disconnect'] or options['exact']):
raise CommandError("One of the options --peers, --disconnect, or --exact is required.")
if options['exact'] and options['peers']:
raise CommandError("The option --peers may not be used with --exact.")
if options['exact'] and options['disconnect']:
raise CommandError("The option --disconnect may not be used with --exact.")
if options['peers']:
missing_peers = set(options['peers']) - set(nodes)
@@ -31,7 +43,7 @@ class Command(BaseCommand):
results = 0
for target in options['peers']:
instance, created = InstanceLink.objects.get_or_create(source=nodes[options['source']], target=nodes[target])
_, created = InstanceLink.objects.get_or_create(source=nodes[options['source']], target=nodes[target])
if created:
results += 1
@@ -46,3 +58,16 @@ class Command(BaseCommand):
results += n
print(f"{results} peer links removed from the database.")
if options['exact']:
additions = 0
with transaction.atomic():
peers = set(options['exact'])
links = set(InstanceLink.objects.filter(source=nodes[options['source']]).values_list('target__hostname', flat=True))
removals, _ = InstanceLink.objects.filter(source=nodes[options['source']], target__hostname__in=peers - links).delete()
for peer in peers - links:
_, created = InstanceLink.objects.get_or_create(source=nodes[options['source']], target=nodes[target])
if created:
additions += 1
print(f"{additions} peer links added and {removals} deleted from the database.")